/*
 * Copyright 2016 The Closure Compiler Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'require es6/reflect/getownpropertydescriptor';
'require es6/reflect/getprototypeof';


/**
 * Helper function to find a descriptor.
 * @param {!Object} target
 * @param {string} propertyKey
 * @return {!ObjectPropertyDescriptor|undefined}
 */
$jscomp.findDescriptor = function(target, propertyKey) {
  var /** ?Object */ obj = target;
  while (obj) {
    var property = Reflect.getOwnPropertyDescriptor(obj, propertyKey);
    if (property) {
      return property;
    }
    obj = Reflect.getPrototypeOf(obj);
  }
  return undefined;
};
